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J'ai des problèmes avec cette tâche, car mon actionlisteners. À l'heure actuelle, le panneau a 2 cases à cocher pour changer la police en gras et/ou en italique. Je veux ajouter 4 boutons radio qui peuvent changer la police dans laquelle le "dire" est po Quelqu'un peut-il me dire ce que je fais mal avec mes actionlisteners? Je vous remercie!Java Panel modification de la police boutons radio
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class StyleOptionsPanel extends JPanel implements ActionListener, ItemListener
{
private JLabel saying;
private JCheckBox bold, italic; // have a button for style1, button for style2, button for style3
private JRadioButton style1, style2, style3, style4; //creates the buttons for each of the 4 styles
{
bold = new JCheckBox ("Bold", true);
italic = new JCheckBox ("Italic", true);
style1 = new JRadioButton ("Arial", true);
style2 = new JRadioButton ("Times New Roman", false);
style3 = new JRadioButton ("Verdana", false);
style4 = new JRadioButton ("Thonburi", false);
//also check out quote options panel file for example of radio buttons.
//after creating your radio buttons, you have to create a button group. copy line exactly from quote options panel
//comedy = new JRadioButton ("Comedy", true); - example of assigning radio button
//comedy.setBackground (Color.green);
ButtonGroup group = new ButtonGroup(); //use this code for the homework
group.add (style1);
group.add (style2);
group.add (style3);
group.add (style4);
style1.addActionListener (this);
style2.addActionListener (this);
style3.addActionListener (this);
style4.addActionListener (this);
add (style1);
add (style2);
add (style3);
add (style4);
}
//-----------------------------------------------------------------
// Sets up a panel with a label and some check boxes that
// control the style of the label's font.
//-----------------------------------------------------------------
public StyleOptionsPanel()
{
saying = new JLabel ("Say it with style!");
saying.setFont (new Font ("Helvetica", Font.PLAIN, 36)); // we'll need this later
bold = new JCheckBox ("Bold"); // what is in quotes doesn't have to match variable being created but it should be descriptive
bold.setBackground (Color.green); // you can also set the background color of the checkbox
italic = new JCheckBox ("Italic");
italic.setBackground (Color.green); // this doesn't seem to change anything for me?
//StyleListener listener = new StyleListener(); //whenever you create a textbox, you have to add a listener for it
//bold.addActionListener (listener);
//italic.addActionListener (listener);
add (saying); //it matters what order these go in, it affects the way that your program looks
add (bold);
add (italic);
add (style1);
add (style2);
add (style3);
add (style4);
setBackground (Color.cyan);
setPreferredSize (new Dimension(300, 100));
}
//*****************************************************************
// Represents the listener for both check boxes and the radio boxes.
//*****************************************************************
private class StyleListener implements ActionListener, ItemListener
{
//--------------------------------------------------------------
// Updates the style of the label font style.
//--------------------------------------------------------------
public void itemStateChanged(ItemEvent e)
{
int style = Font.PLAIN;
if (bold.isSelected()) //this is a boolean statement, on the inside you will always expect some kind of boolean statement
style = Font.BOLD;
if (italic.isSelected())
style += Font.ITALIC; // style += means that it takes whatever style the font already is and then adds the value Italic to it
//public void actionPerformed (ActionEvent event) //also use this code in homework
Object source = e.getSource();// TODO Auto-generated method stub
}
public void actionPerformed(ActionEvent e) // this is our bread and butter, it is basically what we will be changing
{
if (source == style1) //if (source == style1)
saying.setText (Arial); //quote.setText(Helvetica)
else (source == style2)
saying.setText (TimesNewRoman);
else (source == style3)
saying.setText (Verdana);
else (source == style4)
saying.setText(Thonburi);
}
}
@Override
public void itemStateChanged(ItemEvent e) {
// TODO Auto-generated method stub
}
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
}
}